motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add a parameter to disable host cache, by Laurent Vivier.

Browse source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4836 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2008-07-03 11:47:46 +00:00
parent 23fb600b87
commit 2f7264888a
6 changed files with 40 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

22
qemu-nbd.c
View file

@ -34,6 +34,8 @@
#define SOCKET_PATH "/var/lock/qemu-nbd-%s"
#define NBD_BUFFER_SIZE (1024*1024)
int verbose;
static void usage(const char *name)
@ -49,6 +51,8 @@ static void usage(const char *name)
" (default '"SOCKET_PATH"')\n"
" -r, --read-only export read-only\n"
" -P, --partition=NUM only expose partition NUM\n"
" -s, --snapshot use snapshot file\n"
" -n, --nocache disable host cache\n"
" -c, --connect=DEV connect FILE to the local NBD device DEV\n"
" -d, --disconnect disconnect the specified device\n"
" -v, --verbose display extra debugging information\n"
@ -185,7 +189,7 @@ int main(int argc, char **argv)
char *device = NULL;
char *socket = NULL;
char sockpath[128];
const char *sopt = "hVbo:p:rsP:c:dvk:";
const char *sopt = "hVbo:p:rsnP:c:dvk:";
struct option lopt[] = {
{ "help", 0, 0, 'h' },
{ "version", 0, 0, 'V' },
@ -198,6 +202,7 @@ int main(int argc, char **argv)
{ "connect", 1, 0, 'c' },
{ "disconnect", 0, 0, 'd' },
{ "snapshot", 0, 0, 's' },
{ "nocache", 0, 0, 'n' },
{ "verbose", 0, 0, 'v' },
{ NULL, 0, 0, 0 }
};
@ -205,15 +210,19 @@ int main(int argc, char **argv)
int opt_ind = 0;
int li;
char *end;
bool snapshot = false;
int flags = 0;
int partition = -1;
int fd;
int ret;
uint8_t *data;
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
switch (ch) {
case 's':
snapshot = true;
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
flags |= BDRV_O_DIRECT;
break;
case 'b':
bindto = optarg;
@ -301,7 +310,7 @@ int main(int argc, char **argv)
if (bs == NULL)
return 1;
if (bdrv_open(bs, argv[optind], snapshot) == -1)
if (bdrv_open(bs, argv[optind], flags) == -1)
return 1;
fd_size = bs->total_sectors * 512;
@ -394,7 +403,10 @@ int main(int argc, char **argv)
if (nbd_negotiate(bs, csock, fd_size) == -1)
return 1;
while (nbd_trip(bs, csock, fd_size, dev_offset, &offset, readonly) == 0);
data = qemu_memalign(512, NBD_BUFFER_SIZE);
while (nbd_trip(bs, csock, fd_size, dev_offset, &offset, readonly,
data, NBD_BUFFER_SIZE) == 0);
qemu_free(data);
close(csock);
close(sock);